ladybird/Applications/QuickShow/QSWidget.cpp

152 lines
4.8 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "QSWidget.h"
#include <AK/URL.h>
#include <LibCore/MimeData.h>
#include <LibGUI/MessageBox.h>
#include <LibGUI/Painter.h>
#include <LibGUI/Window.h>
#include <LibGfx/Bitmap.h>
QSWidget::QSWidget()
{
set_fill_with_background_color(true);
set_background_color(Color::Black);
}
QSWidget::~QSWidget()
{
}
void QSWidget::set_bitmap(NonnullRefPtr<Gfx::Bitmap> bitmap)
{
m_bitmap = move(bitmap);
}
void QSWidget::relayout()
{
Gfx::Size new_size;
float scale_factor = (float)m_scale / 100.0f;
new_size.set_width(m_bitmap->width() * scale_factor);
new_size.set_height(m_bitmap->height() * scale_factor);
m_bitmap_rect.set_size(new_size);
update();
}
void QSWidget::resize_event(GUI::ResizeEvent& event)
{
relayout();
GUI::Widget::resize_event(event);
}
void QSWidget::paint_event(GUI::PaintEvent& event)
{
GUI::Painter painter(*this);
painter.add_clip_rect(event.rect());
painter.draw_scaled_bitmap(m_bitmap_rect, *m_bitmap, m_bitmap->rect());
}
void QSWidget::mousedown_event(GUI::MouseEvent& event)
{
if (event.button() != GUI::MouseButton::Left)
return;
m_pan_origin = event.position();
m_pan_bitmap_origin = m_bitmap_rect.location();
}
void QSWidget::mouseup_event(GUI::MouseEvent& event)
{
UNUSED_PARAM(event);
}
void QSWidget::mousemove_event(GUI::MouseEvent& event)
{
if (!(event.buttons() & GUI::MouseButton::Left))
return;
auto delta = event.position() - m_pan_origin;
m_bitmap_rect.set_location(m_pan_bitmap_origin.translated(delta));
update();
}
void QSWidget::mousewheel_event(GUI::MouseEvent& event)
{
auto old_scale = m_scale;
auto old_scale_factor = (float)m_scale / 100.0f;
auto zoom_point = event.position().translated(-m_bitmap_rect.location());
zoom_point.set_x((float)zoom_point.x() / old_scale_factor);
zoom_point.set_y((float)zoom_point.y() / old_scale_factor);
m_scale += -event.wheel_delta() * 10;
if (m_scale < 10)
m_scale = 10;
if (m_scale > 1000)
m_scale = 1000;
relayout();
auto new_scale_factor = (float)m_scale / 100.0f;
auto scale_factor_change = new_scale_factor - old_scale_factor;
m_bitmap_rect.move_by(-Gfx::Point((float)zoom_point.x() * scale_factor_change, (float)zoom_point.y() * scale_factor_change));
if (old_scale != m_scale) {
if (on_scale_change)
on_scale_change(m_scale);
}
}
void QSWidget::set_path(const String& path)
{
m_path = path;
}
void QSWidget::drop_event(GUI::DropEvent& event)
{
event.accept();
window()->move_to_front();
if (event.mime_data().has_urls()) {
auto urls = event.mime_data().urls();
if (urls.is_empty())
return;
if (urls.size() > 1) {
GUI::MessageBox::show("QuickShow can only open one file at a time!", "One at a time please!", GUI::MessageBox::Type::Error, GUI::MessageBox::InputType::OK, window());
return;
}
auto url = urls.first();
auto bitmap = Gfx::Bitmap::load_from_file(url.path());
if (!bitmap) {
GUI::MessageBox::show(String::format("Failed to open %s", url.to_string().characters()), "Cannot open image", GUI::MessageBox::Type::Error, GUI::MessageBox::InputType::OK, window());
return;
}
m_path = url.path();
m_bitmap = bitmap;
m_scale = 100;
if (on_scale_change)
on_scale_change(m_scale);
relayout();
m_bitmap_rect.center_within(rect());
}
}